DOUG THORLEY 4:1 Block Hugger Headers, 1-3/4" x 2-1/2" (GM LS)

These shortie headers are a fantastic way to work some extra horsepower out of your LS powered project. A simple bolt-on installation will have you back out on the road in no time and getting where you're going a little faster. To make these headers last, we built them using industry leading 14-gauge steel tubing with 3/8" thick flanges. Topping all of that off, our headers come beautifully ceramic coated to greatly reduce under-hood temperatures and protect the headers from the environment. All 100% American made, and backed by our lifetime warranty.

Header Style: Shortie Headers
Material: Steel
Finish: Silver Ceramic Coated
Weld Up: Yes, adapters must be fabricated to exhaust system
Primary Tube Diameter: 1-3/4"
Primary Tube Gauge: 14 Gauge
Collector Attachment: 3-bolt flange
Collector Diameter: 2-1/2"
Tuned: No
Flange Thickness: 3/8"
Hardware Included: Yes
Gaskets Included: Yes
Adapters/Reducers Included: Yes
Y-Pipe (Crossover) Included: No
Catalytic Converter(s) Included: No
CARB E.O. #: N/A (pre-1976)
Warranty: Limited Lifetime to original purchaser